What Is the First Sign of Macular Degeneration?
Quick Answer: Blurred or Distorted Central Vision
The first sign of macular degeneration is usually a subtle blurring or distortion of your central vision. Straight lines may appear wavy or bent, and you might notice a hazy, smudged or dark area in the centre of your vision. These symptoms are often gradual in onset with dry age-related macular degeneration (AMD) but they may appear more suddenly with wet age-related macular degeneration (AMD). Early detection through regular eye screenings after 50 years of age is important because vision lost to AMD cannot be fully restored.
Dry AMD vs Wet AMD: Do Symptoms Differ?
Understanding the two forms of AMD helps explain why symptoms may differ.
Dry AMD is the more common form, responsible for 80 to 90% of all AMD cases. It develops gradually as small yellow deposits called drusen accumulate under the retina. Symptoms progress slowly over years and may include:
Gradual blurring of central vision, often involving one of the eyes initially
Need for brighter lighting for reading and other near vision tasks
Difficulty recognising faces at a distance
A faded or washed-out appearance to colours
A blurry or blind spot in the centre of your vision (advanced stage)
Wet AMD accounts for about 10 to 20% of cases of AMD but it is responsible for the majority of severe vision loss from AMD. It occurs when abnormal blood vessels grow beneath the retina and leak fluid or blood. Up to 20% of dry AMD cases may convert to the wet form. Symptoms tend to appear more rapidly:
Sudden distortion of straight lines (metamorphopsia)
A noticeable dark or grey patch in central vision
Rapid decrease in reading vision or visual acuity
Colours appearing less vivid or different between the two eyes
Research shows that 71.9% of patients with wet AMD experience some degree of vision decline within 5 years, even with treatment. This highlights the importance of early detection, as treatment is most effective only when initiated promptly.
Singapore is entering a period of rapid population ageing with 1 in 5 citizens now aged 65 or above with future projections reaching nearly a quarter of the population by 2030. As the leading cause of irreversible central vision loss in older adults, AMD is an increasingly important eye health concern in the ageing population.
The Amsler Grid: A Simple Home Monitoring Test
The Amsler grid is an easy-to-use tool to monitor early changes in central vision resulting from AMD. It consists of a square grid of evenly spaced horizontal and vertical lines with a small central dot used as a target for fixation.
How to use the Amsler grid:
Hold the Amsler grid at a comfortable reading distance (approximately 30 to 40 cm) with good lighting.
If you wear reading glasses, keep them on.
Cover one eye and focus on the central dot with the uncovered eye.
Note whether any of the lines appear wavy, distorted, blurred, or missing.
Repeat the test with the other eye.
If you notice any distortion, waviness, or missing areas on the grid, consult an ophthalmologist promptly. While the Amsler grid has a sensitivity of approximately 50 to 80% for detecting metamorphopsia, its primary value lies in monitoring for change between doctor's appointments, particularly the conversion from dry to wet AMD, which is critical to detect early and requires urgent treatment.
Risk Factors for Macular Degeneration
Several factors increase the likelihood of developing AMD:
Age: AMD risk rises significantly after age 50, with the highest prevalence in those aged 70 and above. The PIONEER study found that over 1 in 3 seniors aged 60 and above had undiagnosed eye conditions including AMD.
Smoking: Current smokers face a substantially higher dose-dependent risk. Smoking is the most significant modifiable risk factor for AMD.
Family history: Having a first-degree relative with AMD increases your risk, suggesting a genetic component.
Cardiovascular disease and hypertension: These conditions affect blood flow to the retina and may contribute to AMD development.
Prolonged UV exposure: Cumulative ultraviolet light exposure over decades increases the risk of developing AMD.
Diet: A diet low in leafy greens, omega-3 fatty acids, and antioxidants is associated with higher AMD risk.
If you are aged 50 or above, or have one or more of these risk factors, regular comprehensive eye screening is recommended.
When to See a Retina Specialist?
You should consult an ophthalmologist or retina specialist promptly if you experience:
Any sudden change in central vision
Wavy or distorted lines when looking at straight edges such as window grills or tiles
A dark, blurry, or smudged area in the centre of your vision
Noticeable differences in colour perception between your eyes
Difficulty reading or recognising faces despite adequate spectacle prescription
Early intervention is particularly important for wet AMD, where anti-vascular endothelial growth factor (anti-VEGF) injection therapy can help stabilise or even improve vision. Currently available anti-VEGF agents such as aflibercept, ranibizumab, and faricimab have demonstrated effectiveness. Treatment outcomes are better when treatment is started early as the disease involves a smaller are of the retina.
At IECRC, our ophthalmologists have extensive experience in diagnosing and managing all stages of macular degeneration. If you are concerned about your central vision, we encourage you to schedule a comprehensive eye assessment.
Frequently Asked Questions
Can macular degeneration lead to complete blindness?
AMD affects central vision but does not typically cause total blindness. Peripheral (side) vision is usually preserved. However, advanced AMD can make everyday tasks such as reading, driving, and recognising faces very difficult. Early detection and treatment can help preserve functional vision for longer.
How often should I check my eyes for macular degeneration after age 50?
A comprehensive eye examination every one to two years is generally recommended for adults aged 50 and above. If you have been diagnosed with early dry AMD, your ophthalmologist may recommend more frequent monitoring, including regular Amsler grid self-checks at home.
Are anti-VEGF injections for AMD painful?
Most patients report minimal discomfort during anti-VEGF injection procedures. The eye is adequately numbed with anaesthetic drops before the procedure, and the injection itself takes only a few seconds. Some patients feel a brief pressure sensation. Mild redness or irritation may occur after the procedure but typically resolves within a day or two.
Can diet and supplements slow down macular degeneration?
The AREDS2 study demonstrated that specific nutritional supplements containing Vitamin C (500 mg), Vitamin E (400 IU), zinc (80 mg), copper (2 mg), lutein (10 mg), and zeaxanthin (2 mg) reduced the risk of progression to advanced AMD by approximately 25%. A diet rich in leafy green vegetables and colourful fruits may also support macular health. However, supplements are not a substitute for regular monitoring and professional eye care.
References
AREDS2: nutritional supplements for AMD. NEI, NIH.
AMD prevalence, progression, and anti-VEGF outcomes. PMC, 2026.
AMD research advances. Foundation Fighting Blindness, 2025.
Singapore ageing population: COS debate 2026. NPTD, Singapore.
Early warning signs of AMD: patient guide. The Eye Foundation, 2025.
Medically reviewed by Dr Ajeet Madhav Wagle, Medical Director and Senior Consultant Ophthalmologist, IECRC
Disclaimer: This article is for general informational purposes only and does not constitute personal medical advice. Please consult an ophthalmologist for guidance specific to your condition.
